yes but mr Galaxy how many have you installed recently?
i have a couple here with same issue, its pcb , bin it , buy a g2-20 while your at it
is your system wired or wireless or both?
just side point , where are the psu's plugged in make sure there is mains present, plug something else there to make sure , unless of course the dvr is there so you know its working etc
replace dvr?